Katharine McPhee Says Pregnancy Can Wait
08/15/2007 AT 07:00 AM EDT
"I [do] definitely want to have a baby, and it's fun to just pretend and look in the mirror," McPhee, 23, told Entertainment Tonight this week about wearing a faux bump to shoot House Bunny. "I think it'll probably hold me off a bit on having a baby.
"Today is the first day I'm wearing the prosthetic belly, which wraps all the way around [to] my back, and it's actually really comfortable," she said.
The American Idol runner-up, who told PEOPLE that she's wearing Nicole Kidman's hand-me-down bump to film the Adam Sandler comedy, added: "I'm really enjoying it. It's hot and sweaty though, but it's like Method acting."
The fake bump is certainly on the larger side, McPhee explained to PEOPLE, "[In this project], I'm in my ninth month, so I should be hanging kind of low."
Meanwhile, her costar in the film, Rumer Willis, is having her own troubles with cumbersome costumes. A picture of the actress featuring her character wearing just a dunce cap and silver back brace was leaked last week.
"I keep bumping into people and having to apologize to everyone," Willis, 18, told ET. "It's fun though ... I'm just really grateful for the opportunity."